/* ============================================================
   Sabtain Ali — Portfolio
   Design system: "Founder's Dossier" — a professional letterhead
   aesthetic. Deep ink hero, cool paper sections, brass accent,
   serif display + sans body + mono meta.
   ============================================================ */

:root {
  --ink: #10151f;
  --ink-soft: #1a2130;
  --paper: #f3f4f1;
  --paper-alt: #ffffff;
  --text: #1a1f2b;
  --text-soft: #5b6472;
  --border: #dcded9;
  --gold: #b08d3e;
  --gold-soft: #d8bd7c;
  --steel: #2c4a7c;

  --serif: 'Fraunces', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', monospace;

  --max: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  opacity: 0.035; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- Header ---------- */
#site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 6%;
  background: rgba(16, 21, 31, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(176, 141, 62, 0.25);
}

.brand {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--serif);
  font-size: 1.35rem;
  color: #f3f4f1;
  letter-spacing: 0.02em;
}
.brand span { color: var(--gold-soft); }
.brand-logo { height: 32px; width: 32px; object-fit: contain; border-radius: 4px; }

nav ul { display: flex; gap: 2.2rem; }
nav a {
  color: #cdd2da;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}
nav a::after {
  content: '';
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--gold);
  transition: width 0.25s ease;
}
nav a:hover { color: #fff; }
nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none; background: none; border: none; color: #fff; font-size: 1.3rem; cursor: pointer;
}

/* ---------- Hero ---------- */
#hero {
  min-height: 92vh;
  display: flex; align-items: center; justify-content: space-between;
  gap: 3rem;
  padding: 7rem 6% 4rem;
  background: radial-gradient(circle at 20% 15%, #1a2436 0%, var(--ink) 60%);
  color: #f3f4f1;
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(176,141,62,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176,141,62,0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 75%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 75%);
}

.hero-inner { max-width: 640px; position: relative; z-index: 2; }

.doc-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
  text-transform: uppercase;
  margin-bottom: 1.4rem;
  display: inline-block;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(176, 141, 62, 0.35);
}

#hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3rem, 6vw, 4.6rem);
  line-height: 1.02;
  margin-bottom: 0.9rem;
}

.hero-role {
  font-size: 1.15rem;
  color: var(--gold-soft);
  font-weight: 500;
  margin-bottom: 1.3rem;
}

.hero-desc {
  color: #b8bdc7;
  font-size: 1.02rem;
  max-width: 540px;
  margin-bottom: 2.2rem;
}

.hero-actions { display: flex; gap: 1rem; margin-bottom: 2.4rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.7rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}
.btn-primary { background: var(--gold); color: var(--ink); }
.btn-primary:hover { background: var(--gold-soft); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(255,255,255,0.3); color: #f3f4f1; }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-soft); transform: translateY(-2px); }

.hero-meta {
  display: flex; gap: 1.8rem; flex-wrap: wrap;
  font-size: 0.85rem; color: #8d94a2;
}
.hero-meta i { color: var(--gold); margin-right: 0.4rem; }

.hero-portrait {
  position: relative;
  flex-shrink: 0;
  z-index: 2;
  width: min(360px, 80vw);
}

.portrait-frame {
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid rgba(176, 141, 62, 0.4);
  background: var(--ink-soft);
}
.portrait-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(35%) contrast(108%);
  display: block;
}

/* ---------- Sections ---------- */
.section { padding: 6.5rem 6%; max-width: var(--max); margin: 0 auto; }
.section.alt { max-width: none; background: var(--paper-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section.alt > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section.alt .doc-tag, .section.alt .section-title { max-width: var(--max); margin-left: auto; margin-right: auto; display: block; }

.doc-tag:not(#hero .doc-tag) { color: var(--gold); border-color: rgba(176,141,62,0.3); }

.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.4vw, 2.7rem);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2.6rem;
}

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 3rem; align-items: start; }
.about-image {
  border: 1px solid var(--border);
  overflow: hidden;
}
.about-image img {
  width: 100%; height: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(20%);
  display: block;
}
.about-copy p { color: var(--text-soft); margin-bottom: 1.2rem; font-size: 1.03rem; }
.about-copy strong { color: var(--text); }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2.2rem;
}
.skill-block h3 {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}
.tag-row { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.8rem;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text);
}
.section.alt .tag { background: var(--paper); }
.tag-row.small .tag { font-size: 0.72rem; padding: 0.3rem 0.65rem; }

/* Experience — ledger */
.ledger { border-top: 1px solid var(--border); }
.ledger-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding: 2.4rem 0;
  border-bottom: 1px solid var(--border);
}
.ledger-date {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--gold);
  padding-top: 0.2rem;
}
.ledger-body h3 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.9rem;
}
.ledger-body h3 span {
  display: block;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-soft);
  margin-top: 0.25rem;
}
.ledger-body ul { margin-bottom: 1.1rem; }
.ledger-body li {
  position: relative; padding-left: 1.1rem; margin-bottom: 0.55rem;
  color: var(--text-soft); font-size: 0.96rem;
}
.ledger-body li::before {
  content: '—'; position: absolute; left: 0; color: var(--gold);
}

/* Education */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}
.edu-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  padding: 1.8rem;
}
.edu-card.featured { border-top-color: var(--gold); background: var(--paper-alt); }
.edu-duration { font-family: var(--mono); font-size: 0.78rem; color: var(--gold); margin-bottom: 0.7rem; letter-spacing: 0.04em; }
.edu-card h3 { font-family: var(--serif); font-size: 1.2rem; margin-bottom: 0.4rem; color: var(--ink); }
.edu-inst { font-size: 0.88rem; font-weight: 600; color: var(--steel); margin-bottom: 0.8rem; }
.edu-card p { font-size: 0.9rem; color: var(--text-soft); }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.6rem;
}
.project-card {
  background: var(--paper-alt);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.section:not(.alt) .project-card { background: var(--paper-alt); }
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 14px 28px rgba(16,21,31,0.08);
}
.project-image {
  height: 180px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.project-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(15%);
  transition: transform 0.4s ease;
}
.project-card:hover .project-image img { transform: scale(1.06); }
.project-card > .project-year,
.project-card > h3,
.project-card > p,
.project-card > .tag-row,
.project-card > .project-link { padding-left: 1.9rem; padding-right: 1.9rem; }
.project-card > .project-year { margin-top: 1.6rem; }
.project-card > .project-link,
.project-card > .tag-row.small { margin-bottom: 1.9rem; display: flex; }
.project-year {
  font-family: var(--mono); font-size: 0.75rem; color: var(--gold);
  margin-bottom: 0.7rem; letter-spacing: 0.05em;
}
.project-card h3 { font-family: var(--serif); font-size: 1.28rem; margin-bottom: 0.7rem; color: var(--ink); }
.project-card p { font-size: 0.92rem; color: var(--text-soft); margin-bottom: 1.1rem; }
.project-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.83rem; font-weight: 600; color: var(--steel);
  margin-top: 0.9rem;
}
.project-link:hover { color: var(--gold); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 3.5rem; }
.contact-avatar {
  width: 96px; height: 96px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--gold);
  margin-bottom: 1.6rem;
}
.contact-avatar img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(20%); }
.contact-copy p { color: var(--text-soft); margin-bottom: 1.6rem; }
.contact-list li {
  display: flex; align-items: center; gap: 0.7rem;
  margin-bottom: 1rem; font-size: 0.95rem; color: var(--text-soft);
}
.contact-list i { color: var(--gold); width: 18px; }
.contact-list a:hover { color: var(--steel); }

.contact-form { background: var(--paper); border: 1px solid var(--border); padding: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form-group { margin-bottom: 1.2rem; }
.form-group label {
  display: block; font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); margin-bottom: 0.5rem;
}
.form-group input, .form-group textarea {
  width: 100%; padding: 0.75rem;
  background: var(--paper-alt);
  border: 1px solid var(--border);
  font-family: var(--sans); font-size: 0.95rem; color: var(--text);
  border-radius: 2px;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--gold);
}
.form-group textarea { min-height: 130px; resize: vertical; }
.form-status { margin-top: 1rem; font-size: 0.88rem; color: var(--steel); min-height: 1.2em; }

/* Footer */
footer {
  background: var(--ink); color: #cdd2da;
  padding: 3rem 6% 2rem; text-align: center;
}
.footer-brand { font-family: var(--serif); font-size: 1.4rem; color: #fff; margin-bottom: 1.4rem; }
.footer-brand span { color: var(--gold-soft); }
.footer-links { display: flex; justify-content: center; gap: 1.8rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.footer-links a { font-size: 0.85rem; color: #cdd2da; }
.footer-links a:hover { color: var(--gold-soft); }
.copyright { font-size: 0.82rem; color: #7d8492; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  nav { display: none; }
  .nav-toggle { display: block; }
  #site-header.open nav { display: flex; position: absolute; top: 100%; left: 0; right: 0; background: var(--ink); flex-direction: column; padding: 1.5rem 6%; z-index: 50; }
  #site-header.open nav ul { flex-direction: column; gap: 1.2rem; }
  #hero { flex-direction: column-reverse; text-align: left; padding: 7.5rem 6% 3.5rem; gap: 2.5rem; }
  .hero-portrait { width: min(280px, 70vw); margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; }
  .about-image { max-width: 320px; margin: 0 auto; }
  .skills-grid { gap: 1.8rem; }
  .ledger-row { grid-template-columns: 1fr; gap: 0.6rem; }
  .education-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .section { padding: 4.5rem 6%; }
  #hero { padding-top: 6.5rem; }
  #hero h1 { font-size: clamp(2.3rem, 10vw, 3rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { text-align: center; justify-content: center; }
  .hero-meta { flex-direction: column; gap: 0.6rem; }
}